Thermal response prediction method for carbon fiber epoxy resin composites
Han LI1,2,*(), Mao-hua FAN1,2, Na-si-dan WANG1,2, Bao-xin FAN1,2, Zhen-yu FENG1,2
1 College of Airworthiness, Civil Aviation University of China, Tianjin 300300, China 2 Key Laboratory of Civil Aircraft Airworthiness Technology, CAAC, Tianjin 300300, China
In order to study the thermal response of carbon fiber epoxy resin composites in fire, considering the pyrolysis process in fire, the nonlinear thermal response equations were established, and a finite difference method was used to calculate and analyse the material's internal time-dependent temperature progressions and carbonization subjected to one-sided heat flux. The theoretical results from the established thermal response equations were validated against experimental data and a good agreement was observed.As the heating time increases, the carbonized layer range gradually expands, the temperature changes tend to be stable, and the distribution of material temperature with depth position is changed from nonlinear to linear. With the increment of the depth, temperature rise rate is decreased, the time of carbon fiber epoxy resin composites reaching the pyrolysis temperature is increased, the carbonization process is slowed down, and the peak change of density with temperature moves toward the low temperature with the increased depth. The residual mass fraction of materials at different depth in the pyrolysis reaction zone is slightly different at the same temperature, the residual mass fraction is decreased and the degree of carbonization is increased as the depth increases.
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2020, Vol. 48 
), 樊茂华1,2, 王纳斯丹1,2, 范保鑫1,2, 冯振宇1,2
